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Reptile [31]
3 years ago
7

Severe or sudden changes in Earth's atmosphere can cause entire species of animals to die. When all of the members of species di

e out, it is called
Chemistry
1 answer:
Oduvanchick [21]3 years ago
7 0

Answer: Extinction

Animals on the verge of extinction are considered endangered species. Some could argue that the phrasing "threatened" is synonymous to "endangered". Some classify extinction based on if the species is completely wiped out in the wild, or if the species is completely gone (both in the wild and in zoos for instance). Extinction events are not solely due to the changes in atmosphere, but also due to lack of food or habitat, among other possible factors.

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<u>Answer:</u> The mass of water that must be reacted is 56.28 grams.

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To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}      ....(1)

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Putting values in equation 1, we get:

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For the given chemical equation:

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By Stoichiometry of the reaction:

1 mole of oxygen is produced when 2 moles of water is reacted.

So, 1.5625 moles of oxygen is produced when = \frac{2}{1}\times 1.5625=3.125mol of water is reacted.

To calculate the mass of water, we use equation 1:

Moles of water = 3.125 moles

Molar mass of water = 18.01 g/mol

Putting values in equation 1, we get:

3.125mol=\frac{\text{Mass of water}}{18.01g/mol}\\\\\text{Mass of water}=56.28g

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